This is awesomely reminiscent of the old school 68k macintosh era - dogcow, oscar the grouch in the trash can, etc I miss that simplicity / playfulness / aesthic of that era (yes I am old, please get off my lawn)
Arguably the Kaleidoscope fits into this category too. While there were tame themes for it that did more tame things like make your Mac look like Windows/BeOS/NeXTSTEP/etc, many third party Kaleidoscope schemes skewed more whacky and fun than your average theme software. Ever wanted your desktop to look like a pair of jeans[0], a dwarven forge[1], 2D top-down space shooter[2], or cute cartoon jungle[3]? Kaleidoscope has you covered.
[0]: https://i.ibb.co/x1YsFqt/denim-scheme-dtdenimsit-vbpf.png [1]: https://i.ibb.co/fdXKKV2/eritis-forge-2-eitrisforge2sit-p5vq... [2]: https://i.ibb.co/TryF6VQ/boilerplatetm-boilerplatesit-vrao.p... [3]: https://i.ibb.co/cCLYpKL/monkeyparadise-monkeyparadisesit-ss...